Compete writes "We have some interesting analysis on how Social Networking sites compare to portals. From a sample size of around 2 million US people, Compete concludes that social networking sites are quickly approaching the traffic level of the big portals like Google and Yahoo. They liken the growth of SNS to email in the 90's. Their key findings: 1. In June, 2 out of every 3 people online visited a social networking site 2. Since January 2004, the number of people visiting or taking part in one of the top online social networks has grown by over 109% 3. Social networking sites are now close to eclipsing traffic to the giants — Google and Yahoo"